Experimental Study on Strengthening and Sealing Materials and Their Application in Coal Mines

Table 4

R² analysis.

Source	Sequential value	Adjusted R^2	Predicted R^2
Linear	<0.0001	0.4507	0.9150
2FI	0.7690	0.3865	0.9008
Quadratic	0.0100	0.8493	0.9693	Suggested
Cubic	0.8493	0.9430